Public/Reset-WindowsActivation.ps1
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#Requires -Version 5 <# .Synopsis Resets Windows activation settings. .DESCRIPTION A drop in replacement for slmgr /upk, /cpky and /ckms commands. Uninstalls the product key, clears it from the registry, and/or clears KMS settings. Multiple switches can be combined in a single call. .INPUTS string[]. You can pass the computer names. .OUTPUTS None if successful. Throws on error. .EXAMPLE Reset-WindowsActivation -UninstallProductKey -Verbose .EXAMPLE Reset-WindowsActivation -UninstallProductKey -ClearProductKeyFromRegistry -Verbose .EXAMPLE Reset-WindowsActivation -ClearKMSSettings -Verbose .EXAMPLE Reset-WindowsActivation -Computer WS01 -Credentials (Get-Credential) -UninstallProductKey -ClearProductKeyFromRegistry -ClearKMSSettings .LINK https://github.com/zbalkan/slmgr-ps #> function Reset-WindowsActivation { [CmdletBinding(SupportsShouldProcess = $true, PositionalBinding = $false, ConfirmImpact = 'High')] Param ( # Type localhost or . for local computer or do not use the parameter [Parameter(Mandatory = $false, Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, ValueFromRemainingArguments = $false)] [AllowNull()] [string[]] $Computer = @('localhost'), # Define credentials other than current user if needed [Parameter(Mandatory = $false, ValueFromPipeline = $false, ValueFromPipelineByPropertyName = $false, ValueFromRemainingArguments = $false)] [AllowNull()] [PSCredential] $Credentials, # Uninstall the product key (slmgr /upk) [Parameter(Mandatory = $false)] [switch] $UninstallProductKey, # Clear the product key from the registry (slmgr /cpky) [Parameter(Mandatory = $false)] [switch] $ClearProductKeyFromRegistry, # Clear KMS settings (slmgr /ckms) [Parameter(Mandatory = $false)] [switch] $ClearKMSSettings ) Begin { if (-not $UninstallProductKey.IsPresent -and -not $ClearProductKeyFromRegistry.IsPresent -and -not $ClearKMSSettings.IsPresent) { throw 'At least one reset operation must be specified: -UninstallProductKey, -ClearProductKeyFromRegistry, or -ClearKMSSettings.' } } Process { Write-Verbose "Enumerating computers: $($Computer.Count) computer(s)." foreach ($c in $Computer) { if (-not $PSCmdlet.ShouldProcess($c, 'Reset Windows activation settings')) { continue } Write-Verbose "Creating new CimSession for computer $c" $session = $null try { $session = Get-Session -Computer $c -Credentials $Credentials -ErrorAction Stop if ($UninstallProductKey.IsPresent) { $product = Get-WindowsLicensingProduct -CimSession $session Write-Verbose 'Uninstalling product key (slmgr /upk)' $product | Invoke-SppCimMethod -MethodName UninstallProductKey } if ($ClearProductKeyFromRegistry.IsPresent -or $ClearKMSSettings.IsPresent) { $service = Get-CimInstance -CimSession $session -ClassName SoftwareLicensingService -ErrorAction Stop } if ($ClearProductKeyFromRegistry.IsPresent) { Write-Verbose 'Clearing product key from registry (slmgr /cpky)' $service | Invoke-SppCimMethod -MethodName ClearProductKeyFromRegistry } if ($ClearKMSSettings.IsPresent) { Write-Verbose 'Clearing KMS settings (slmgr /ckms)' $service | Invoke-SppCimMethod -MethodName ClearKeyManagementServiceMachine $service | Invoke-SppCimMethod -MethodName ClearKeyManagementServicePort } } finally { if ($null -ne $session) { Remove-CimSession -CimSession $session -ErrorAction Ignore | Out-Null } } } } } |